Exercising-machine



J. ARNBTT. Exercising-Machine.

Patented Aprius, 1880.

.amd F N. PETERS, PHOTO-MHOGRAP UNITED STATES PATENT OEETCEo JOHNARNETT, OF SPRINGFIELD, OHIO.`

EXERClSING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 226,438, dated April13, 1880. Application tiled September 15, 1879.

To all whom it may concern:

Be it known that I, J oHN ARNETT, of the city of Springfield, in thecounty of Clarke and State' of Ohio, have invented new and usefulImprovements in Exercising-Machines, which are clearly, fully, andconcisely set forth in the following specification.

My invention relates to machines for registering the weight or force ofa blow given to a plunger-rod which is held in a vertical position inthe bore of an upright block. The rod rests. upon one end of a pivotedlever, which receives the weight of the blow and transmits the forcethrough the opposite end to a spring-dart which is thrown up between twolong vertical guides at the rear end of the machine.

The face of the guide-board is graduated, from end to end .on each side,in increased ratio of figures, which denote, in hundreds of pounds andthe fractions thereof, the force of the stroke which is given to theplunger-rod by a wooden hammer or maul in the hands of the striker.

Figure l is a side elevation of my improved exercising-machine, which Icall a striking machine.77 Fig. 2 is a plan view of the same, the lidwhich covers the lever-box between the block and guide being removed toshow the position ofthe lever and connections from the top. Fig. 3 is aview of the guide-board detached. Fig. 4 is an enlarged view of thedart. Fig. 5 is an enlarged view of one of the spring-gibs which holdthe lower ends of the metal guides in position to press upon the dart.

A is the block, which is solid and cylindrical, with a conical top, a,which is surmounted by a smaller cylindrical section, a', turned on thepeak of the block. This is hooped by a heavy iron band, and its top isalso capped with the same material to protect it from the effects of adiversion of the blow aimed at the plunger-rod b in the central hole,b', and which is seen projecting above the block in Fig. l. The relativeposition of the plungerlrod b and the lever C, on the end of which itstands, are shown in this ligure, a section being shown broken out. Asection of the lever-box B is also shown in the same way.

The block A stands on a heavy base-plank,

A, which extends under the entire machine, projecting enough on thesides and front end to give it solidify and firmness. The leverbox B isconstructed with two heavy plank sides, d (l, set up edgewise, with anarrow space between them, in which the large lever O is pivoted. Thislever is constructed of heavy malleable or wrought iron, about fourinches broad in the middle and tapering to'- ward each end, the underedge being slightly curved. It is about three-quarters ofan inch thick.The upper edge is straight. The forward end has a seat for theplunger-rod and the rear end of the dart.

The lever C is pivoted centrally, a hole being drilled through it, andthe pin t' inserted through it and the planks d, which form the sides ofthe box. To allow the forward end of the lever to move through the arcof a circle, the block A is cut or mortsed a little beyond its center,as shown in Fig. 1 and in dott-ed lines in Fig. 2.

Where the pivot-pin t' rests in its bearings iron plates are bolted tothe inside of the leverbox to give additional strength. At the rear, oneach side of the lever-box, are seen linkbolts jj, which connect thetransverse bar Z (which is bolted to the back of the upright D) with theends of bolts 7c. These latter pass through the plank d and angularguide-plate d (between the planks d) on each side, securing the latterin place on each side of the lever O, and prevent any lateral movementof the same, besides protecting the wood of the box from injury when thelever is operated.

D is the guide-post, which is detachable, being made so as to be easilyseparated from the rear end of the box B. A hook-pin, 71 connects itslower `end with the base A', and the link-boltsj above connect it withthe planks d d, a thread being cut on the outer ends of theselink-bolts, and a nut screwed on behind the plate l on each side. An eyeon the forward end of j slips over the end of bolt lo', and is securedby a nut in the same manner.

On the front of the post D two long strips of metal are fastened,forming the guides g g. These are graduated by an ascending scale from 0to 1000, ascending on the guide g and descending on guide g.

The operation of my machine is as follows:

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The plunger-rod b is inserted in the hole 1)' in the block A, resting onthe forward end of lever C. The dart D' (seen in Figs. l, 3,and 4) ispushed. down on the other or rear end of the lever, between guides g g',till it reaches the bottom, raising the forward end of lever C andpushing the top end of the plunger-rod up out of the block. (See Fig.l.) It is now ready to receive the stroke of the man1. When this isgiven the dart is thrown upward. The point at which it stops indicatesthe force of the blow. A very heavy blow carries it to the top of theguides, where it comes in contact with a spring-plate,m. (See detail,Fig. 4.) rEhis is a right-angled plate, extending back between the topends of the guides, and has a rubber spring, a, under it, and is madewith a slot or extended hole, so that when it receives the shock of thedart-head it will move slightly on its fastening-bolt f, by which it isattached, through this slot, to the head of post D.

The object of the spring-plate m is to cause the dart D' to rebounddownward by the in` creased force of the blow, and to mark its tally onthe scale g' on the left. (See Fig. 3.) The guide-plates g g are notfastened all the way down the post D, but are loose near the bottom, andare provided with spring-gibs o, which press upon them and increase thepressure on the dart. rIhe gibs 0 consist of a cylindrical case, Vp, inwhich there is a plunger, S', having a spiral spring, S. The plunger iscut through so as to form a fork, which straddles the outer edge of eachguide-plate near its bottom end. The gibs are provided'l with a broadbase-plate, by which they are screwed to the edges of post I).

The spring-dart D' is made in the form of a cross in its body part. Itscross -bar r is grooved vertically to straddle the inner edges of theguide-plates g g'. The vertical bar r' has its lower end made alsol inthe form of a cross', (inverted,) its arms' bearing against the iwo longcurved springs t t. The upper ends of these are formed with an enlargedpart, from which extends a threaded bolt end. This passes up through thebar r, and has a nut, u', on it. A rubber gasket, o', is interposedunder the nut a', to prevent the shock upon the dart from breaking thesprings t t. (See Figs. 3 and 4.) The springs t t have their lower endsturned outwardly at right angles,

, and are also slotted vertically to straddle the edges of the guides.The springs taper from the bar r a short distance down, and, being long,extend the bearing-points ofthe dart on the guides, and serve to stop itprecisely at the point where the force which propels it is expended,thus accurately registering the weight or force of the blow given.

Having thus described my invention, what I claim is l l. In anexercising-machine for registering the weight of a blow from a maul orhammer, the following elements, viz: a block, A, for receiving andretaining within its central bore, b', an upright plunger-rod, b, apivoted lever, G, on the forward end of which said plungerrod rests whenthe machine is in its operative position, a spring-dart, D', soconstructed as to be retained between the edges of vertical guide-platesr/ g', operated from the opposite end of said pivoted lever, andavertical guidepost, D, provided with two graduated scales forregistering both the primary force and thev rebound from thespring-plate m at the top of said guide-post.

2. In the guide-post of an exercising-machine for registering the weightof a blow, the guides g and g', having a gradually-increasing numericalscale from bottom to top on guide g, and from top to bottom on guide g',as and for the purpose hereinbefore set forth.

3. In combination with spring-guides g g', constructed as shown, thespring-dart D' and spring-gibs o o. as and for the purpose described. l

4. Spring-dart D', constructed substantially as described, and havingits cross-bar r grooved vertically at its ends to straddle the inneredges of guide-plates g g', its vertical bar r', made in the form of aninverted cross at the lower end, to bear against the curved springs t t,and having the latter also grooved or slotted at their lower ends forthe purpose of operating, in connection with said spring-guides, inregistering the weight of a blow given to the plunger-rod b, andtransmitted to said dart through the pivoted lever C, as set forth.

5. In au exercising-machine, as specified, a detachable guide-post, D, alever-box, B, connecting the same with a cylindrical block, A, a pivotedlever within said lever-box, and a spring-dart, D', operatedsubstantially as described.

JOHN ARNET'I.

Attest:

B. G. GoNvnnsE, M. M. GoNvnR-sn.

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